NFS tips and tricks: Difference between revisions
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calls badcalls badfmt badauth badclnt | calls badcalls badfmt badauth badclnt | ||
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</syntaxhighlight> | |||
== Check NFS server supported version == | |||
$ sudo cat /proc/fs/nfsd/versions<syntaxhighlight lang="bash"> | |||
On Ubuntu 20.04, NFS version 2 is disabled. Versions 3 and 4 are enabled. You can verify | |||
$ sudo cat /proc/fs/nfsd/versions | |||
-2 +3 +4 +4.1 +4.2 | |||
</syntaxhighlight> | </syntaxhighlight> | ||
== References == | == References == | ||
<references /> | <references /> | ||
Revision as of 10:49, 2 January 2024
nfsd: too many open connections, consider increasing the number of threads[1]
NFS uses threads on the server to handle incoming and outgoing I/O requests. Using threads helps NFS scale to handle large numbers of clients and large numbers of I/O requests.
dmesg display when reach some high number of clients. should increase Number of NFS daemons (nfsd) by changing the RPCNFSDCOUNT variable in /etc/default/nfs-kernel-server on a Debian-based machine. (Ubuntu 20.04)
Find the number of NFS daemons in two ways
ps -aux | grep nfs
or
$ ps -aux | grep nfs | wc -l
To change nfsd count temperarly, use
# rpc.nfsd 16
To change nfsd count permenently increase RPCNFSDCOUNT variable in /etc/default/nfs-kernel-server (Ubuntu 20.04)
then restart nfs server.
$ cat /etc/default/nfs-kernel-server
# Number of servers to start up
RPCNFSDCOUNT=64
...
$ sudo systemctl restart nfs-server.service
$ ps -aux | grep nfs | wc -l
65
Check nfs status
$ nfsstat -r
Server rpc stats:
calls badcalls badfmt badauth badclnt
0 0 0 0 0
Check NFS server supported version
$ sudo cat /proc/fs/nfsd/versions
On Ubuntu 20.04, NFS version 2 is disabled. Versions 3 and 4 are enabled. You can verify
$ sudo cat /proc/fs/nfsd/versions
-2 +3 +4 +4.1 +4.2